SUSE-SU-2026:0688-1
Vulnerability from csaf_suse - Published: 2026-02-27 15:09 - Updated: 2026-09-16 19:06Summary
Security update for the Linux Kernel
Severity
Important
Notes
Title of the patch: Security update for the Linux Kernel
Description of the patch:
The SUSE Linux Enterprise 11 SP4 kernel was updated to fix various security issues
The following security issues were fixed:
- CVE-2021-0920: net: split out functions related to registering inflight socket files (bsc#1193731).
- CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent (bsc#1245986).
Patchnames: SUSE-2026-688,SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-688
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.8 (High)
Affected products
Recommended
15 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-base-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-default-devel-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-docs-3.0.101-108.201.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-base-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-ec2-devel-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-source-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-syms-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-trace-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-trace-base-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-trace-devel-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-xen-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-xen-base-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 11 SP4 LTSS EXTREME CORE:kernel-xen-devel-3.0.101-108.201.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
Affected products
Recommended
15 products, the same list as for
CVE-2021-0920
Threats
Impact
important
References
21 references
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"category": "general",
"text": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel",
"title": "CVE description"
}
],
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"category": "general",
"text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let\u0027s make it idempotent\nto ease qdisc_tree_reduce_backlog() callers\u0027 life:\n\n1. update_vf() decreases cl-\u003ecl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl-\u003eel_node, but we can use\n RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.",
"title": "CVE description"
}
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}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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